Arrangement in condensers



Nov. 9, 1937. a. HANSSON 2,098,746

ARRANGEMENT IN CONDENSERS Filed March 20, 1936 2 Sheets-Sheet 1 fi-g m 1WQ 2% gig f/z yem or E/"Or flu/(s30 flzfol'n e Nov. 9, 1937. B, HANS ON2,098,746

ARRANGEMENT IN CONDENSER'S Filfld larch 20, 1936 2 Sheets-Sheet 2 1 .//1Yew for.

Patented Nov. 9, 1937 UNITED STATES 2,098,746 ARRANGEMENT m connnsssasBroi- Hanson. Stockholm, Sweden, assignmto Allminna Svenaka EiektriskaAktiebolaget, Vasteras, Sweden, a Swedish corporation Application March20, 1936, Serial No. 69,779 In Sweden September 2, 1935 Claims.

The present invention relates to condensers of the type consisting ofmetal foil electrodes wound spirally to a roll with an intermediaryinsulating layer. In such condensers the roll is as a rule inserted in atank containing an insulating medium, generally oil, and the heat lossesof the condenser are conducted to the surrounding atmosphere through theoil and the walls of the tank. The oil in the tank is often put underpressure, higher than that of the surrounding air, so that theinsulating strength is increased considerably more than the heatdissipation quality of the oil. As the load capacity of the condenserdepends to a high degree upon the heat dissipating quality, a veryeffective cooling is, therefore,

of paramount importance.

from the interior of the condenser is effected when one electrode of thecondenser makes direct metallic contact with a wall in the tankenclosing the condenser. When the tank is filled with a medium underpressure the wall making contact with the foils must never yield underthe pressure to which it is subjected as this would greatly lessen thecooling action. This refers especially to tanks with plane walls as mostcommonly used for condensers.

The present invention has for its object the provision of means wherebythe cooling wall with the condenser foils pressed against it remains inits original plane condition in spite of the interior pressure actingupon it in the tank.

In the accompanying drawings which illustrate the invention, by way ofexample, in diflerent formsz- Fig. 1 is a cross-section of one form ofthe condenser;

Fig. 2 is a similar view 01' another form;

Fig. 3 is an enlarged view partly in section of a third form; and

Figs. 4 and 5 are sectional views taken at right angles to each otherand showing still another form of the condenser made in accordance withthis invention.

In the form shown at Fig. l, the condenser rolls i are inserted into acylindrical tank 3 with a circular, flexible bottom wall it and acircular cooling wall 2 against which the toils protruding at the endsof the condenser rolls l are pressed. The tank 3 is filled with oilunder pressure and the flexible wall 3! is corrugated in order to betterwithstand the stresses due to the internal pressure. Another tank"having a flexible wall 32 similar to the former one II but enclosing nocondenser elements is placed on the other side 01' the cooling wall 2.The two tanks communicate with each other, so that the pressure is thesame on both sides of the wall 2.

The cooling wall 2 consists of two metal sheets 2|, 22 with spacingpieces conveniently consisting of warts or beads 23 stamped into thesheets and other impressions, if required, for stiflening the sheets.The warts of the two sheets. are turned against each other and welded orsoldered or joined to each other by other means. A firm double wall isthus formed and inside of it a cooling fluid, such as water, maycirculate.

The cooling wall 2 is placed horizontally with the condenser elementsunderneath the same so that the heat from the condenser elements istransmitted to the surrounding fluid and rising upwards with same may becollected at the cooling wall 2 and led away from the same by thecooling medium.

In Figure 2 one metal sheet 2| is plane and the other 22 is cupolashaped and cooling fluid is .circulated between them. The double wallformed by the sheets is stiffened by means of distance pieces 25, whichalso serve as cooling .two, with the plate walls 2 turned towards eachother but separated by means of intermediary pieces ii and being boltedtogether by means of the flanges of the plate walls and flanges 12 on anouter tank 4, made in four sections. When assembled the condenser tanks3 are suspended inside the tank 4 between the flanges l2. The innertanks 3 and also the outer tank 4 are fllled with "a medium (liquid orgas) under pressure; and the adjacent tanks 3 which are bolted togethercommunicate with each other for example by means of a hole in the platewalls 2. The pressure on both sides of the double wall 2 is thus thesame and the wall remains in its original plane condition. The spacingpieces ll holding the plate walls 2 apart from each other are arrangedin such a way that channels are formed between the walls and in thesechannels a cooling medium is circulating. The supply pipe of thecirculating medium is shown at 9.

As one electrode is in direct metallic contact with the tank 3 and asthis is connected to the tank d, the latter forms one pole of thecondenser battery. The tank d should therefore be insulated from groundand the cooling medium vshould be led to the supply pipe 9 by means ofan insulating tube. The other pole or terminal connection of thecondenser is carried through the tanks by means of the bushings and ii.

Figs. 4: and 5 show an arrangement in which the cooling wall 2 is commonto both of two tanks 3, enclosing the condenser elements i placed oneach side of the wall which has the protrudwall, a second wall servingas a support for the cooling wall, and means for applying to the secondwall fluid pressure equal to the pressure of the saidmedium in the tankto maintain the said cooling wall in plane form.

2. In a condenser of the character described, a tank, a medium underpressure in the tank, a

' cooling wall subjected to the pressure of said medium, condenserelements enclosed in the tank and having their rolls pressed against thesaid wall, a second wall serving to support the said cooling wall,depressions formed in said walls and secured to each er, and means forapplying fluid pressure to the second wall to support both walls.

3. In a condenser or the character described, a tank, a medium underpressure in the tank, a cooling wall subjected to the pressure'of saidmedium, condenser elements enclosed in the tank and having their foilspressed against the said wall, a second wall adjacent to the coolingwall, cooling and supporting flanges between said walls, and means forapplying fluid pressure to the second wall to supportthe cooling wall inplane form.

4. In a condenser of the character described, a tank, a medium underpressure in the tank, a cooling wall subjected to the pressure of saidmedium, condenser elements enclosed in the tank and having their foilspressed against the said wall, means for applying fluid pressure-tosaidwall to maintain same in plane form, and at least one elastic wall formaintaining fluid pressure upon the wall.

5. In a condenser of the character describeda tank, a medium underpressure. in the tank, a cooling wall subjected to the pressure of saidmedium, condenser elements enclosed in the tank and having their foilspressed against the said wall, means for maintaining said wall in planeform against the pressure of said medium, means for supplying coolingmedium to said wall, and

means for electrically insulating the same fromsaid wall.

BROR BSON.

